Hey im bleeding browny redy blood n its not heavy really lite im due on my period in a bout 5 d ays what could this be I have never had this happen?

Spotting. Sounds like low Progesterone spotting before your period. Keep a menstrual diary and see if it gets normal next cycle. If it persists, you may need a Progesterone boost. Other things cause spotting like polyps, fibroids and infections. And always consider pregnancy if it's a possibility.